import { Tracer, Span } from "@opencensus/core";
import { GraphQLResolveInfo, ResponsePath } from "graphql";
export declare const openCensusTracer: unique symbol;
export declare const openCensusSpanMap: unique symbol;
export declare function openCensusTracingGraphQLMiddleware(resolve: Function, parent: any, args: any, context: {
    [openCensusTracer]?: Tracer;
    [openCensusSpanMap]?: Map<ResponsePath, Span>;
}, info: GraphQLResolveInfo): Promise<any>;